Haida GND0.6 Optical Glass Split Gradual Graduated Neutral Density ND Filter 100x150mm High Quality Square 100x150mm Optical Glass Split Gradual Graduated Neutral Density Filter ND 0.6 4X to 0 Haida Neutral Density filters are constructed from high quality optical glass for increased optical clarity and color fidelity Split ND Filter Reduce Exposure in selective area of the frame ie: Horizons Equally effective in color or black and white photography and does not affect the overall coloration of the image. Fits to Haida 100 Square Filter Holder (Model No:HD2500) and Optional Adapter Ring 49-82mm (Model No.:HD2509) Includes Filter Case & Cloth